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Set Semantics¶
This tool is used to set semantics in EPUB files. Semantics are simply,
links in the OPF file that identify certain locations in the book as having
special meaning. You can use them to identify the foreword, dedication, cover,
table of contents, etc. Simply choose the type of semantic information you want
to specify and then select the location in the book the link should point to.
This tool can be accessed via Tools->Set semantics.

Though it’s described in such a simple way, there might be hidden power in adding these tags, especially when we bring eBooks to the Semantic Web. Though books are the prime example of a “Web of Documents”, they can also contribute to the “Web of Data”, if we enable them. It might take long, but it could happen.

Ah, yes! It may sound technical to some, but there’s something very useful about deep linking which can help fulfill Berners-Lee’s Semantic Web idea much more appropriately than what is currently available.
Despite so many advances in Web publishing (and the growing interest in Linked Open Data), it’s often difficult to link directly to an online item of interest.
In a way, Hypothesis almost allows readers to add anchor tags to an element so it can be used in a direct link.

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The “Open World Assumption” is central to this post and to the actual shift in paradigm when it comes to moving from documents to data. People/institutions have an alleged interest in protecting the way their assets are described. Even libraries. The Open World Assumption makes it sound quite chaotic, to some ears. And claims that machine learning will solve everything tend not to help the unconvinced too much.
Something to note is that this ability to say something about a third party’s resource connects really well with Web annotations (which do more than “add metadata” to those resources) and with the fact that no-cost access to some item of content isn’t the end of the openness.

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I feel that there is a great benefit to fixing this question
at the spec level. Otherwise, what happens? I read a web
page, I like it and I am going to annotate it as being a
great one -- but first I have to find out whether the URI my
browser is used, conceptually by the author of the page, to
represent some abstract idea?